ovis. 17 



Colorado River, south into Sonora, Mexico, as far as Seriland, opposite 

 Tiburon Island in the Gulf of California. 



Genl. Char. Size small, muzzle dark-colored; horns long and 

 strongly incurved; no white on throat. 



Color, Winter Pelage. Rump, belly and posterior surface of limbs 

 white ; rest of body with neck and head ecru-drab, darkest on shoulders, 

 hips and middle of back; vertebral stripe; tail dark brown; the white 

 rump divided by a stripe of the same color. Summer Pelage. General 

 color pale rusty buff, darkening to drab on neck. 



Measurements. Total length, 1200; tail vertebrae, 120; ear from 

 crown, 120; fore foot with hoof, 270; hind foot with hoof, 315; height 

 at shoulders, 770; at hip, 870; length of horn, .163. 



The type specimen is very young, and about half -grown, with the 

 second and third molars not yet above the jaw. From a number of 

 examples in the United States National Museum, the following descrip- 

 tion and measurements are taken from an adult male. 



Color. Nose and lips white; head, cheeks and throat whitey 

 brown ; rest of neck and chest bistre, darkest on chest ; middle of back 

 grayish brown ; rest of back and flanks pale brussels-brown with many 

 white tips to the hairs, giving a shimmering effect; a white patch on 

 rump, divided in the middle by a dark seal-brown line; underparts 

 white; thighs and front part of limbs bistre, hind part white; tail 

 bistre. 



Measurements. Skull: Total length about 300; occipito-nasal 

 length, 227; Hensel, 260; length of nasals, 124.6; length of upper 

 molar series, 85.6; length of mandible, 222; length of lower molar 

 series, 92.2; length of horns along curve, 825; circumference of horn 

 at base, 363; spread of horns at tips, 695. 



Ovis cervina sierrae Grinnell. 



Ovis cervina sierra Grinnell, Univ. Calif. Pub. Zool., X, 1912, p. 144. 



Type locality. East slope of Mount Baxter, Sierra Nevada, Inyo 

 County, California, altitude, 11,000 feet. 



Ovis cervina texana Bailey. 



Ovis canadensis texianus Bailey, Proc. Biol. Soc. Wash., XXV, 1912, 

 p. 109. 



Type locality. Guadalupe Mountains, El Paso County, Texas. 



Genl. Char. Similar to O. mexicanus but darker. Chief characters 

 the very narrow muzzle, nasals and palate. Horns of female long, thin 

 and slender, molars heavy. 



Color. Upperparts dull buffy brown; rump-patch pure white 

 with a narrow medium dark line; nose whitish; belly whitish; whit- 



